activitypub / includes / class-post.php

class-post.php in ActivityPub 0.5.0, at includes/class-post.php

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1	<?php
2	namespace Activitypub;
3
4	/**
5	* ActivityPub Post Class
6	*
7	* @author Matthias Pfefferle
8	*/
9	class Post {
10	private $post;
11
12	/**
13	* Initialize the class, registering WordPress hooks
14	*/
15	public static function init() {
16	add_filter( 'activitypub_the_summary', array( '\Activitypub\Post', 'add_backlink' ), 10, 2 );
17	add_filter( 'activitypub_the_content', array( '\Activitypub\Post', 'add_backlink' ), 10, 2 );
18	}
19
20	public function __construct( $post = null ) {
21	$this->post = get_post( $post );
22	}
23
24	public function get_post() {
25	return $this->post;
26	}
27
28	public function get_post_author() {
29	return $this->post->post_author;
30	}
31
32	public function to_array() {
33	$post = $this->post;
34
35	$array = array(
36	'id' => get_permalink( $post ),
37	'type' => $this->get_object_type(),
38	'published' => date( 'Y-m-d\TH:i:s\Z', strtotime( $post->post_date ) ),
39	'attributedTo' => get_author_posts_url( $post->post_author ),
40	'summary' => $this->get_the_summary(),
41	'inReplyTo' => null,
42	'content' => $this->get_the_content(),
43	'contentMap' => array(
44	strstr( get_locale(), '_', true ) => $this->get_the_content(),
45	),
46	'to' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
47	'cc' => array( 'https://www.w3.org/ns/activitystreams#Public' ),
48	'attachment' => $this->get_attachments(),
49	'tag' => $this->get_tags(),
50	);
51
52	return apply_filters( 'activitypub_post', $array );
53	}
54
55	public function to_json() {
56	return wp_json_encode( $this->to_array(), JSON_HEX_TAG \| JSON_HEX_AMP \| JSON_HEX_QUOT );
57	}
58
59	public function get_attachments() {
60	$max_images = apply_filters( 'activitypub_max_images', 3 );
61
62	$images = array();
63
64	// max images can't be negative or zero
65	if ( $max_images <= 0 ) {
66	$max_images = 1;
67	}
68
69	$id = $this->post->ID;
70
71	$image_ids = array();
72	// list post thumbnail first if this post has one
73	if ( function_exists( 'has_post_thumbnail' ) && has_post_thumbnail( $id ) ) {
74	$image_ids[] = get_post_thumbnail_id( $id );
75	$max_images--;
76	}
77	// then list any image attachments
78	$query = new \WP_Query(
79	array(
80	'post_parent' => $id,
81	'post_status' => 'inherit',
82	'post_type' => 'attachment',
83	'post_mime_type' => 'image',
84	'order' => 'ASC',
85	'orderby' => 'menu_order ID',
86	'posts_per_page' => $max_images,
87	)
88	);
89	foreach ( $query->get_posts() as $attachment ) {
90	if ( ! in_array( $attachment->ID, $image_ids, true ) ) {
91	$image_ids[] = $attachment->ID;
92	}
93	}
94	// get URLs for each image
95	foreach ( $image_ids as $id ) {
96	$thumbnail = wp_get_attachment_image_src( $id, 'full' );
97	$mimetype = get_post_mime_type( $id );
98
99	if ( $thumbnail ) {
100	$images[] = array(
101	'url' => $thumbnail[0],
102	'type' => $mimetype,
103	);
104	}
105	}
106
107	$attachments = array();
108
109	// add attachments
110	if ( $images ) {
111	foreach ( $images as $image ) {
112	$attachment = array(
113	'type' => 'Image',
114	'url' => $image['url'],
115	'mediaType' => $image['type'],
116	);
117	$attachments[] = $attachment;
118	}
119	}
120
121	return $attachments;
122	}
123
124	public function get_tags() {
125	$tags = array();
126
127	$post_tags = get_the_tags( $this->post->ID );
128	if ( $post_tags ) {
129	foreach( $post_tags as $post_tag ) {
130	$tag = array(
131	'type' => 'Hashtag',
132	'href' => get_tag_link( $post_tag->term_id ),
133	'name' => '#' . $post_tag->slug,
134	);
135	$tags[] = $tag;
136	}
137	}
138
139	return $tags;
140	}
141
142	/**
143	* Returns the as2 object-type for a given post
144	*
145	* @param string $type the object-type
146	* @param Object $post the post-object
147	*
148	* @return string the object-type
149	*/
150	public function get_object_type() {
151	if ( 'wordpress-post-format' !== get_option( 'activitypub_object_type', 'note' ) ) {
152	return ucfirst( get_option( 'activitypub_object_type', 'note' ) );
153	}
154
155	$post_type = get_post_type( $this->post );
156	switch ( $post_type ) {
157	case 'post':
158	$post_format = get_post_format( $this->post );
159	switch ( $post_format ) {
160	case 'aside':
161	case 'status':
162	case 'quote':
163	case 'note':
164	$object_type = 'Note';
165	break;
166	case 'gallery':
167	case 'image':
168	$object_type = 'Image';
169	break;
170	case 'video':
171	$object_type = 'Video';
172	break;
173	case 'audio':
174	$object_type = 'Audio';
175	break;
176	default:
177	$object_type = 'Article';
178	break;
179	}
180	break;
181	case 'page':
182	$object_type = 'Page';
183	break;
184	case 'attachment':
185	$mime_type = get_post_mime_type();
186	$media_type = preg_replace( '/(\/[a-zA-Z]+)/i', '', $mime_type );
187	switch ( $media_type ) {
188	case 'audio':
189	$object_type = 'Audio';
190	break;
191	case 'video':
192	$object_type = 'Video';
193	break;
194	case 'image':
195	$object_type = 'Image';
196	break;
197	}
198	break;
199	default:
200	$object_type = 'Article';
201	break;
202	}
203
204	return $object_type;
205	}
206
207	public function get_the_content() {
208	if ( 'excerpt' === get_option( 'activitypub_post_content_type', 'content' ) ) {
209	return $this->get_the_post_summary();
210	}
211
212	return $this->get_the_post_content();
213	}
214
215	public function get_the_summary() {
216	if ( 'Article' === $this->get_object_type() ) {
217	$excerpt = $this->get_the_post_excerpt( 400 );
218
219	return html_entity_decode( $excerpt, ENT_QUOTES, 'UTF-8' );
220	}
221
222	return null;
223	}
224
225	/**
226	* Get the excerpt for a post for use outside of the loop.
227	*
228	* @param int Optional excerpt length.
229	*
230	* @return string The excerpt.
231	*/
232	public function get_the_post_excerpt( $excerpt_length = 400 ) {
233	$post = $this->post;
234
235	$excerpt = get_post_field( 'post_excerpt', $post );
236
237	if ( '' === $excerpt ) {
238
239	$content = get_post_field( 'post_content', $post );
240
241	// An empty string will make wp_trim_excerpt do stuff we do not want.
242	if ( '' !== $content ) {
243
244	$excerpt = strip_shortcodes( $content );
245
246	/** This filter is documented in wp-includes/post-template.php */
247	$excerpt = apply_filters( 'the_content', $excerpt );
248	$excerpt = str_replace( ']]>', ']]>', $excerpt );
249
250	$excerpt_length = apply_filters( 'excerpt_length', $excerpt_length );
251
252	/** This filter is documented in wp-includes/formatting.php */
253	$excerpt_more = apply_filters( 'excerpt_more', ' [...]' );
254
255	$excerpt = wp_trim_words( $excerpt, $excerpt_length, $excerpt_more );
256	}
257	}
258
259	return $excerpt;
260	}
261
262	/**
263	* Get the content for a post for use outside of the loop.
264	*
265	* @return string The content.
266	*/
267	public function get_the_post_content( $with_link = true ) {
268	$post = $this->post;
269
270	$content = get_post_field( 'post_content', $post );
271
272	$filtered_content = apply_filters( 'the_content', $content );
273	$filtered_content = apply_filters( 'activitypub_the_content', $filtered_content, $this->post );
274
275	$decoded_content = html_entity_decode( $filtered_content, ENT_QUOTES, 'UTF-8' );
276
277	$allowed_html = apply_filters( 'activitypub_allowed_html', '<a><p>' );
278
279	return trim( preg_replace( '/[\r\n]{2,}/', '', strip_tags( $decoded_content, $allowed_html ) ) );
280	}
281
282	/**
283	* Get the excerpt for a post for use outside of the loop.
284	*
285	* @param int Optional excerpt length.
286	*
287	* @return string The excerpt.
288	*/
289	public function get_the_post_summary( $summary_length = 400 ) {
290	$summary = $this->get_the_post_excerpt( $summary_length );
291
292	$filtered_summary = apply_filters( 'the_excerpt', $summary );
293	$filtered_summary = apply_filters( 'activitypub_the_summary', $filtered_summary, $this->post );
294
295	$decoded_summary = html_entity_decode( $filtered_summary, ENT_QUOTES, 'UTF-8' );
296
297	$allowed_html = apply_filters( 'activitypub_allowed_html', '<a><p>' );
298
299	return trim( preg_replace( '/[\r\n]{2,}/', '', strip_tags( $decoded_summary, $allowed_html ) ) );
300	}
301
302	public static function add_backlink( $content, $post ) {
303	$link = '';
304
305	if ( get_option( 'activitypub_use_shortlink', 0 ) ) {
306	$link = esc_url( wp_get_shortlink( $post->ID ) );
307	} else {
308	$link = esc_url( get_permalink( $post->ID ) );
309	}
310
311	return $content . '<p><a href="' . $link . '">' . $link . '</a></p>';
312	}
313	}
314